How to Install Harland Sharp Roller Rockers on a Jeep 4.0

These are the S40196 Harland Sharp Roller Rockers Made in the USA. These Harland Rocker Arms are good for 9 plus horsepower across the entire rpm curve. They are great in reducing friction at the pivot point and at the valve tip, which also greatly reduces valve guide wear.
Check out this video as well to see the HP gains of these rockers • Do Roller Rockers Make... This video is also a great way to see how to change a valve cover gasket.
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Harland Sharp (S40196) 1.6:1 Ratio Rocker Arm Pedestal Mount for 4.0L Jeep amzn.to/2CzZK44
Harland Sharp S40196A Jeep 4.0L Rocker Arm 1.6 Ratio Adjustable amzn.to/3f2pZDG
Fel-Pro VS50458R Valve Cover Set amzn.to/2WvJUQh
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FYI if you click any of the product links above and end up purchasing anything I MAY get paid a small commission at no extra charge to you. This is one of the ways you can support the channel. Your support helps me bring out more content for all of you. Martinbuilt assumes no liability for property damage or injury incurred as a result of any of the information contained in this video. Use this information at your own risk. No information contained in this video shall create any expressed or implied warranty or guarantee of any particular result. Any injury, damage, or loss that may result from the information contained in this video is the sole responsibility of the user and not Martinbuilt. Martinbuilt cannot guarantee against improper use or unauthorized modifications of this information.
#martinbuilt
#martinbuilt #jeepmods #jeep4.0mods

[@TheBigmatt6969]

I use to think this would be hard thanks for the video man good job

[@rogueakita1]

Thanks Martin, for some reason I thought that video was related to another project. Guess I need to watch it and see if'n I wanna tackle it. Thanks again. for all the posts, have a great night.

[@indridcold8433]

My rockers are making quite clattering noise after 24 years of ownership. I tighten them from time to time and it helps quiet them down a bit. I may get these to fix the diesel sounding engine permanently. Age has got the rockers to have a wear mark on all of them.

[@revolutionday1]

.....right?! I've got a full exhaust on my WJ, and the rockers are STILL louder! X-D

[@stevee7774]

Yeah, don’t worry about the lifters or pushrods or anything like that...

[@indridcold8433]

@@stevee7774 The lifters are solid. They really can not go bad. It is a very old vehicle. At 439,000 miles on a petrol engine, those rockers can be expected to be somewhat worn.

[@indridcold8433]

@@revolutionday1 The AMC 242ci I6 seems to be good at doing a diesel impersonation.

[@stevee7774]

@@indridcold8433 - Sorry, but the Jeep 4.0L engine he was working on has HYDRAULIC lifters. If it had solid lifters then he would have had to set valve lash instead of just tightening the rockers down to a specific torque.

[@patrickmadigan829]

A HELPFUL TRICK FOR REMEMBERING WHICH VALVE COVER BOLT GOES WHERE ID TO TRACE THE NEW GASKET ON A PIECE OF CARDBOARD AND PUSH THEM INTO THE BOARD AS YOU REMOVE THEM. MADE THINGS EASIER WHEN I REPLACED MY VC GASKET.

[@martinbuilt]

patrick madigan Good idea...thanks for commenting

[@darrellwilliams4520]

That's a great lil tip that I will remember! Thanks!

[@7spower998]

Great video. However, it's a good practise when performing work on any engine 7:15 Never dump used oil back to the engine 8:17 Use Permatex Ultra Slick Engine Assembly Lube on any mating surfaces 8:33 For ease of installation, insert allen bolts thru roller rocker arms holes and hold them in place in the palm. Turn palm right side up, then insert from the top two pedestal mount thru allen bolts . Hold them in place with fingers. Then, align the roller rocker assembly to rocker mounting holes

[@williambratly8050]

Removing the baffling in the valve cover will lead to oil consumption, the baffling is part of (Pcv) system) positive crankcase ventlation system, It helps prevent oil being pulled in to the engine cylinders were it will durn.

[@martinbuilt]

This is true, I ended up removing the hose from the intake and installing a small K&N breather filter.

[@theirishconservative2536]

Or what I have done . connect both hoses to a T fitting than run a hose to an external oil catch can

[@SalFettucini]

Im guessing that an oil cooler will mitigate any potential for a rise in temperature, as a result of the filter being right above the valve cover, but does that lack of an intake hose create a drop in the overall rate of volume of air? Do you think it's affected the air fuel mixture?

[@LaunceBugbee]

*CCV

[@chuckkowalski2593]

Another great " How to" and upgrade.. Excellent work and thanks!

[@oldprophet]

Simply Awesome. Love your videos.

[@dandahermitseals5582]

You didn't say what engine but it looks like the 4.0 inline 6 in my Comanche jeep that currently has clicky rocker arms at 195000 miles. Engine is running very good.

[@martinbuilt]

Yes this was the 4.0 engine.

[@ekbanjosworld4926]

What are the advantages of these on a tractor engine designed for low end torque? Do you have a high performance cam? Higher rate valve springs? Heavier push rods? My main ? did they kill the oh so familiar clatter? Where did you find a 68 mm throttle body and what fuel injectors are you using? I love your channel dude! Always good stuff!

[@martinbuilt]

The advantage of these is it reduces the friction between the rocker and the valve stem tip. And it reduces wear on the valve guide. The result is more horsepower because of the reduced friction. All my other components are OEM.

[@rah121760]

Nice upgrade Martin! Always enjoy your upgrade videos.

[@GenoThumper]

Thanks love your videos. Just found your cast yesterday.

[@martinbuilt]

Glad you like them!

[@davidnicoll9140]

Your videos have helped me so much, awesome!

[@martinbuilt]

Thank you, David. I really appreciate that. I'm glad you liked it and found it helpful.

[@BONGHITTAH420]

No torque wrench?

[@ekbanjosworld4926]

Martin, am I hearing a Pete Jackson Gear Drive? I the air intake noisy in the cab!

[@martinbuilt]

No I don't have a gear drive. And the cab noise from the air intake is not noisy at all. The only time there is a little bit of noise is that the initial cold starts. It only lasts for twenty to fifty seconds or so.

[@travisguy6044]

Really quieted down got me thinking about doing it to my zj now lol...goodstuff👍

[@martinbuilt]

They are worth it, 8 to 13 HP gain and less wear to the guides.

[@orangek5]

@@martinbuilt 8 to 13 with only this???

[@martinbuilt]

@@orangek5 yes check out this video kzbin.info/www/bejne/gYjXl6JqqrlpZ6c

[@LZDEN]

very nice indeed..great job Martin.

[@Dino30ish]

Shouldn't you install these on each cylinder starting at #1 on TDC (Torque to 19ft lbs) , then rotate the engine so the next cylinder in the firing order is on TDC and repeat the cycle ? ............... Torquing these down against spring pressure will give you a false torque reading and leave the rocker arms loose when at TDC on a particular cylinder .......

[@martinbuilt]

+Norman Murray Thanks for mentioning that. You are right.

[@jbossnack]

I've never manually advanced the pistons. how do you do that?

[@Dino30ish]

Put a socket on the crankshaft damper/ pulley bolt and turn it clock wise ... It will be easier to do if the spark plugs are removed because there will be no compression .....

[@rwooten67]

No because you have hydraulic lifters. They will compensate for whatever position the cam is in.

[@waynesanders1406]

Lifters have a .030" range of operation you want to stay within. Go outside of that range and you can damage the lifter, either wear out the tolerances inside and have a collapsed one or have them too lose and the push rod knocks the retainer clip wonky and it flies apart. I've had both happen, and the latter just happened yesterday.

[@luketrochinski3954]

What size 90 degree silicone elbow do you have for your intake? How can I get one?

[@titaniumman_22]

Martin, I know this was a long time ago, but if you are still on KZbin…did you need to do anything with the camshaft to use the new roller rockers? Love your videos brother! I’d want to put an inspection window on the valve cover so I watch those babies rock and roll!

[@martinbuilt]

I still have the Jeep and runs great. No modifications necessary. Yeah a transparent top valve cover would be cool. 😎

[@nathanhoover3636]

just out of curiosity, do you have any oil burning issues after cutting out the baffle? I am probably going to end up having to do the same thing on my 4.6 stroker because nothing else will make those rockers fit. my idea was to do the same thing and run a catch can to prevent oil burning and to make the motor run cleaner in general.

[@martinbuilt]

Yeah, I ended up running a hose with a small K&N filter and mounting it on the firewall because it was sucking the oil and burning it through the intake manifold. I should just install a catch can.

[@MaryKelleher-m4f]

Did you find that the roller rockers are worth it considering the heavy cost in comparison to stock lifters? $550 s alot of $. I'm considering getting some myself while im replacing my 0331 head. Thank Martin for this awesome video. I saved it to one of my play list as reference when I may put these puppies in (if I busy) Repped and subscribed! looking forward to more of your videos!

[@martinbuilt]

Yeah I do believe the rockers are worth it they do actually gain you 8 to 13 horsepower. There was a video done on that with Dyno testing that proved this.

[@carldietz9767]

What about the lifter backlash/preload and centering roller on valve head using shims under rocker stands, and lifter preload using proper length push rods? That is how you get the maximum benefit from your large investment in roller rockers.

[@fariasyanez650]

Question what state are you in

[@treehugger4682]

Did you use a torque wrench on the rockers and if so what are the specs

[@imagineaworld]

Call me blind but was that a torque wrench or were you just eyeballin it? Also, they look good in there, but what is it really worth to cut your baffle out? We do not know more than jeep so dont hit me with with why it isnt necessary, i would not cut my baffle... id rather have a spacer machined, half an inch maybe? The hoods got room if im at all familiar..

[@TheCthtoNicfLy]

DUDE INTAKE SPECKS what's the air intake temp with the pipe over the engine, I just think It's not any cooler, polish the cover

[@zacharygraham4962]

I think baffle was supposed to redirect oil onto rockers

[@mrantihippie]

Zachary Graham my older renix style cover didn't have one, but this would make sense. The newer lighter covers all had baffles

[@nathan00campbell]

its there to try and keep oil out of the PCV valve and intake breather lines. some times you will not notice it missing but any blow by at all and you will now think you have burnt rings or valves because you will be sucking oil into the intake and burning it causing blue smoke from the exhaust. bottom line, its there for a reason and best to not remove it. if it does not fit with the new rockers then its time for a taller cover. simple as that. why spend good money on upgrades just to cut corners on the instal

[@anthony_sasquatch8056]

Very cool man!

[@martinbuilt]

I'm glad you liked it 👍 😊

[@denvernichols6626]

Harland sharp changed the torque specs to 24ft lb

[@martinbuilt]

Thanks for the update.

[@rogueakita1]

Great video Martin, thanks for posting. Wife threw a rod in my sons jeep XJ 4 months ago while he's in Japan.lol For him I threw a Crower Baja Beast Level 1 cam in with +.030 Overbore piston and rebuilt it with Banks header and airaid intake. I am putting the HarlandSharp roller rockers in the 4.6L Stroker in my XJ. btw what's the specs on your throttle body, likes vs dislikes? thanks

[@martinbuilt]

the throttle body is a 68 millimeter off a 4.7 liter Dodge Dakota. I ported and polished it. and I had to build a special adapter to go from the four bolt to a 3 bolt pattern. I can't say that there was a big horsepower gain it's hard to feel. it definitely seems to open up on the upper end. and it has more of a roar to it. I do have a video on it. I can say this I'm not going back to a 62 that I had on before

[@jeksdad5979]

Do you have any stats on the adapter you built?

[@chrisketchum3576]

Love the video but i gotta ask its been bugging me what are the an fittings running to in the corner of the driver side behind your headlight i got an oil catch can there for mine

[@jlathem56]

After removing the baffle were there any issues?

[@martinbuilt]

Yes I had to relocate a breather and remove it from the throttle body. As it was drawing oil into the intake manifold.

[@majhmr6257]

If one hasn't done any work under the gasket cover to this point in their build, when installing the Roller Rockers, is there any other general maintenance or items to consider replacing other than the gasket while it is off?

[@martinbuilt]

well there are a number of things you could change out push rods if you like and I would probably most likely inspect the valve guide seals of course that does involve removing the valve retainers. that can be a pretty big job. but then the chorus if it needs to be done it needs to be done.

[@revolutionday1]

Pushrods.

[@FootageFactory]

So badass. I'm doing this next.

[@informKPBoateng]

I can’t find these for sale hardly anywhere. But I found the exact ones with an “a” at the end, i guess it means adjustable. Will those still work? Without extra work?

[@martinbuilt]

Yeah they would work but you will need to set the lash. It's not to hard with hydraulic lifters, when the rocker tip makes contact with the valve stem them you turn 1 and half more to set the lash. Harland Sharp S40196A Jeep 4.0L Rocker Arm 1.6 Ratio Adjustable amzn.to/3f2pZDG

[@AngelMartinez-wf3iu]

I installed those in my Jeep xj whit a wider throttle body N a throttle body spacer .now I just touch the gas n it pulls good but also it reduce the gas mileage.

[@martinbuilt]

I can assure you the rocker arms aren't to cause of your lower MPG. Is the throttle body opening bigger than the intake manifold and if so it needs to be enlarged as well to match to the throttle body.

[@jtmlucas]

just wondering you daily drive this jeep have any problems with them? doing full build with mine having hard time finding info about life span

[@irishjoe9195]

As long as you take of this Jeep they could last a very long time, These Engines are very resilient if I would say.

[@francisbrackney2061]

Everything that I have looked up claims 8 to 10 HP gain with full roller rocker arms on a 4.0 jeep.

[@martinbuilt]

that is correct, I've heard 8 to13 HP

[@mrantihippie]

My 93 didn't have a bafel. Is a older renix style cover. Does the balef really aid these or should i just stick with my renix cover ? These newer style ones looks cheesy, even sounded so in vid. If it provides a advantage tho i'm swapping it with o e at the yard

[@martinbuilt]

Taylor Mallory I personally think you can stick with your old cover. And honestly I don't think I would have needed to remove the baffle in my steel valve cover. I think the ones that cause a problem are the cast aluminum that have a baffle

[@revolutionday1]

I was SO pumped after watching this and seeing exactly how simple of a job this is..... Then.... I clicked the link and saw the price, which made my eyes water. *sigh*

[@martinbuilt]

I feel that they are worth it, and good for 8-13 HP all because of the reduced friction.

[@francisbrackney2061]

I think it is about the same for the old 4.2 AMC jeep also, some of the parts interchange also I think.

[@kseel6453]

The manufacturer states they only make them for 1983 to 1986 Jeep CJ 258. Why not earlier 258's they do not specify, but it may have to do with the valve cover clearance on earlier 258's.

[@Denver1976Man]

@@kseel6453 did you ever figure anything out on this? I have an 88but the motor was made in 87. I don't know what the differences would be except maybe the rod size.

[@Moto_x11]

I got these rockers coming soon.. Question has anyone tried to slightly dent the baffle where the lifters contact? I really dont want to use a spacer with a double gasket so I'm gonna try to save $150. First I'm gonna need to figure out how much clearance I need with modeling clay.

[@martinbuilt]

Yeah, I've kind of wondered the same thing about the clearance issue with these rockers. I also have bought another valve cover and was going to use the clay method that you mentioned and see just how much clearness there is.

[@Moto_x11]

@@martinbuilt Nice video btw I guess it's off to the races to see who gets it done first! I'll let you know how it goes when I get the parts in. I should get the Rockers by Saturday. If all fails I'm gonna go with the valve cover spacer

[@mnvjim7900]

@@Moto_x11 did you ever find out how the clearance was with the valve cover?

[@Moto_x11]

@@mnvjim7900 sorta it hits on a certain spot you could potentially hit with a hammer but don’t remove your baffle. I read ppl had oil consumption problems after doing that. I returned my rockers because you need a spacer for the thermostat housing 2 gaskets and 2 gaskets for the spacer I bought for the valve cover. I was $800 into it and I rather not take the additional risk of the gaskets failing. I went with enginetech rockers and those worked good for me.

[@shaethompson2060]

Did you have to send the head off to a shop or do anything with the valves before you did this or is it pretty much ug and play?

[@martinbuilt]

It is a complete bolt on and play. Been running these rockers for quite a few years now never had a problem with them.

[@nickolasholliday]

Are these rocker arms adjustable for lash ?

[@martinbuilt]

No they are not.

[@abackimages5351]

They did videos on horsepower gains and its 9 to 15 hp gain on dyno.

[@martinbuilt]

yeah, I just saw that video a month ago or so, that makes them worth the money.

[@Aracnacon1]

What was the reason you upgraded?

[@martinbuilt]

Initially it was to help reduce the wear of the valve guides and then it has been proven that there is approximately an 8 plus horsepower gain by using this cuz of the reduced friction. And because I had some money that was burning a hole in my pocket 😁

[@mrhighway]

When you remove the tray under the valve cover would that affect the PCV system?

[@martinbuilt]

Yeah it does ends up putting oil into the intake manifold. I ended up just running a hose up higher with a filter attached to the firewall. I got another valve cover one of these days I'm gonna try just installing it rotating the engine and see if it makes any contact with that metal.

[@shanedass9339]

I noticed you have a bleeder valve on your heater hose. where did you get it? having a hard time getting all the air out of my cooling system.

[@martinbuilt]

Walmart

[@shanedass9339]

Your kidding. Online or in the store?

[@martinbuilt]

In the store. Just above the antifreeze, next to the flush.

[@andrewslagle1974]

its a coolant flush t you get it in a coolant flush kit.you can get them at wallmart or any parts place

[@DB-yj3qc]

@@andrewslagle1974 Do but a spare one though, after a few years they can turn brittle and break. I've had to replace a few.

[@peteradke2816]

what's that whining sound during start up?!

[@esti5506]

Why does it sound like its super charged? Is that the new rockers whining, or something else?

[@martinbuilt]

I know it's not the rocker arms that did that I think it's the cold air intake that I'm running and with a 68 mm throttle body.

[@SalFettucini]

Hey Martin! You think these rockers, new pushrods and lifters will settle alright on a 4.0 camshaft with 60k on it?

[@martinbuilt]

With only 60000 miles is there a reason you're changing the lifters and pushrods. If you want to save a lot of work and some money I would just install the rocker arms. You'll need to pull the cylinder head to change the lifters.

[@SalFettucini]

@@martinbuilt well, either i have a lifter tick or a piston skirt may be on its way out. I figure i may as well swap them if im doing the rockers, but ill be pulling the oil pan first to see if theres any metal sitting in it. A compression test came up fine as well, but the tick remains. Id like to get rid of it if i can!

[@tmmyjay]

Are these self adjusting?

[@martinbuilt]

In a word yes the lifters are making the adjustments. Same as OEM.

[@shanedimon1911]

I have a question. Do you have to drain the engine oil to do this

[@martinbuilt]

No, you don't have to do that, but it may be a good time to change the oil after you get the rocker arms installed.

[@stevee7774]

Only if the engine is upside down.

[@bryancordero4522]

hey, when u cut off that oil pan inside the head cylinder cover, the oil didn't go through hose straight to the intake? and how many power u get after that swap, I know less friction mean better displacement that make sense.

[@martinbuilt]

If I would do this again I would not cut out that metal under the rocker cover and see if it would clear. A small amount of oil will go into the intake. I ended up taking that hose off and installing a vent filter and mounting it high on the fire wall.

[@mikejohnson4276]

martinbuilt ....so dont. I tried that for that reason and it doesn't clear, all of them rub on the baffling and bent 3 or 4 pushrods. I had 12 spare rods so it was a quick free repair, but I removed the baffling and it's fine and a lot quieter

[@GenoThumper]

What push rods, and lifters should l use with Harland Star rocker Rollers in my 95 Jeep yj 4.0 liter?

[@martinbuilt]

You can just use factory lifters and pushrods

[@claycoates5056]

wonderful video there in no advantage to doing this to an older motor great for a new build will increase the life of the valve trail thank you for your time

[@heyitsemmett1324]

Where did he relocate the vacuum line from his pcv valve when he installed his new intake?

[@martinbuilt]

the 68mm throttle body I installed has a vacuum line fitting. Or you install a small K&N style filter to the end of the vacuum hose and tie strap to the fire wall.

[@moparlover1968rr]

Did you install the 1.6 ratio version?

[@martinbuilt]

Yeah, that sounds right. Is there another because there weren't any other ratios available when I installed these?

[@moparlover1968rr]

@@martinbuilt I think that’s what all of them are with the research I’ve done so far, but I have seen some say 1.7 ratio, but I’m thinking they are wrong.

[@moparlover1968rr]

@@martinbuilt I’m sure there are no other’s, people getting confused with the Dodge 360 rollers I believe

[@martinbuilt]

@@moparlover1968rr Yeah, I think that is what it is. These are awesome rollers. Been running them for years with no issues.

[@Mr.Agosto]

What have you noticed with this mod? Performance wise...Thinking about doing it on my mini stroker build. But i have the 7120 head and a renix valve cover, wondering if i'll have clearance issues

[@stevee7774]

He noticed a definite reduction in his bank account.

[@Ben-lo7cy]

Nice How To video 👍🏼

[@carloscartaya9932]

Great video! So how did it feel on the test drive? Sounds sweeeeeet, thanks

[@martinbuilt]

They are great, been in there now for almost 5 years, and their good for another 9 plus horsepower.

[@petiewheatstraw8537]

Where do you find your special parts like your bigger intake and harland roller rockers or similar? It is tough to find jeep parts on 4.0's. What are the benefits after your install? Chatter more? HP or power gain? Run smoother, cooler?

[@martinbuilt]

+Petie Wheatstraw I'm not having a hard time finding parts for the 4.0. Just google what your looking for. As far as the rockers go, I wouldn't say there is not a great benefit to them, especially with a stock cam. They are quiet, no noticeable improvement in HP. It would take a dyno to see any gains and I think it would be minimal.

[@crkerriklein]

the main reason for doing roller rockers, is less wear on the valve stems and also stronger rockers, the stamp steel rockers tend to bend over time

[@EyebrowsMahoney]

That "bigger intake" is the stock late model 4.0L intake manifold. You can pick those up off any late model (99+) Cherokee and it's pretty much straight bolt in. I think you might need to make some mods to the mounting of the fuel rail, but I can't remember. Unless you're talking about the intake tubing he used to relocate his intake to the cowling, in that case it's all custom. 4.0L's have a decent parts market out for them. You can pick up stuff at Summit or Quadratec for them.

[@martinbuilt]

Eyebrows Mahoney 99 plus

[@EyebrowsMahoney]

+martinbuilt thanks for the correction. I've edited to reflect

[@WildNwhEELING]

Price for new roller rockers if have a kit or not please specify if could please and thank you

[@martinbuilt]

Harland Sharp (S40196) 1.6:1 Ratio Rocker Arm Pedestal Mount for 4.0L Jeep amzn.to/2CzZK44

[@honeybadger7320]

Did you just replace the rockers or in a previous video replace the cam as well?

[@martinbuilt]

I just replaced the rockers

[@trakkerp4202]

Nice how to, even get a laugh when you hear a minion go off out of nowhere lol

[@martinbuilt]

Glad you enjoyed it, that was probably my cell phone letting me know I have a text message.

[@GenoThumper]

What about springs? Buy different springs, or keep old springs?

[@martinbuilt]

If you are going to install the Harland rockers, it is the only thing you need to do, remove and replace.

[@GaJeepr]

Cool. Nice install Martin. Something tells me there is a seat of the pant$ feeling with these.

[@martinbuilt]

+Scott McIntyre Your funny Scott, Yes there is that kind of seat in the pants feeling. I shopped around and got them through JEGS for 359.77. Jegs price matched someone, I forget who.

[@GaJeepr]

+martinbuilt Good Price! You would spend ~$144 on factory ones if you replaced after a full cylinder head job. ( SealedPower price via RockAuto). Thanks again. Doing the WJ brake upgrade you did on your XJ to my MJ.

[@stevee7774]

Yes, his wallet which resides in the seat of his pants is definitely lighter.

[@JoseLopez-ep9jl]

Hello martin one question where you buy this rollers i need a buy ones.?

[@martinbuilt]

amzn.to/2OghvMS

[@eggnogfrog]

Torque wrench! 21 ft. lbs.

[@richardarmstrong5928]

6 foot cheeter and a Bruce Lee kick

[@waynesanders1406]

It says 19 in my Haynes manual for I6's.

[@kevindewaly8127]

Every year 4.0 is diffrent

[@GenoThumper]

What difference would hydraulic lifters do? and

[@martinbuilt]

I'm no familiar with the Ford Edge, I would inspect all the control arm and track bar bushings and replace any worn parts.

[@citydemo5701]

whats that winning noise when you work the the throttle cable

[@Wyde-awake]

The cowl induction intake and it looks like he's got a bored out throttle body.

[@citydemo5701]

the last video said you get like 25 hp from this upgrade? what you think?

[@martinbuilt]

25 horsepower that would be huge and definitely something I would have felt or I should say I would have felt it torque increase from this I did not. There is Maybe a few horsepower gain but something that you would have to see on a dyno.

[@tomashton7208]

since the 4.0 is almost the same as the 2.5 4 banger will those rockers work too.? whats the rocker arm ratio?

[@martinbuilt]

1.6 ratio

[@deadspeed6679]

What ratio are these ?

[@martinbuilt]

1.6:1 that is the same as OEM.

[@deadspeed6679]

@@martinbuilt what’s the difference between 1.6 and 1.7? Which are better

[@jhudson19956]

Let’s see some Jeep pics

[@martinbuilt]

Check out facebook.com/Martinbuilt-2351766611763181 Thank you for watching.

[@AudioFreqx]

Great video. but

[@gristlevonraben]

Less lifter noise, Sir.

[@tappearson2372]

More power, less resistance.

[@alenbegonja418]

Martin nice job what size rockers

[@martinbuilt]

Alen Begonja They only come in one 1.6:1 which is stock ratio

[@jorgezuni2818]

I thought stock would be 1.5 ratio and the 1.6 the upgrade ratio .

[@my_name_is_chef4856]

What does this actually change for you? Like performance wise.

[@martinbuilt]

Less stress on valve stems reducing guide ware.

[@camocorndog]

martinbuilt That's sweet! i have a Valve seal going on my Jeep 4.0... Time for some Jeep Parts! 😆

[@Taydrum]

Hey I know this is 3 years late, but does this reduced friction and wear help with fuel economy?

[@leighakley9328]

Should't Each cylinder/piston should be at top dead center compression when torqueing the cap screws to prevent bridge twist.

[@LaoMa9]

Why did you change it? Better performance or nice to have?

[@AudioFreqx]

100% legit Q

[@gordongman3423]

Just found you channel. Have you seen any significant difference ? New sub

[@martinbuilt]

Gordon GMan it's not going to give you a hp gain that you're going to feel. It greatly reduce valve guide wear and increase rpm potential. Thanks for subscribing.

[@DanteThoriz]

Martin, What benefits gives the engine?

[@landoflakes92]

None

[@nickolasholliday]

Less engine drag but on a stock engine not much but maybe a 1 hp

[@calypsoford9338]

what kind of oil pressure do you have with these arms?

[@martinbuilt]

The same as it was. No lose or gain

[@calypsoford9338]

martinbuilt the reason I ask. I just installed these on a rebuilt engine and at start up I have 60psi and at warm idle oil temp it goes down to 13 psi and goes up to 40 psi when gas is added.

[@martinbuilt]

That sounds like a normal engine to me. That's how my engine acts for over 6 years that I've owned it.

[@blakebailey852]

Weird I have 38psi hot idle 45ish cruising roughly 48 cold idle Haven’t been into the Engine might have some after market part or something. Any thoughts...

[@timmyl2005]

Yes, Lots of thoughts. I have them all the time!!! But you probably have an aftermarket Oil lightening Preasure reducer installed. Sometimes people install them when they do the valve cover gasket. There just not needed. they can be hot and cold sensitive. They tend to give false Pressure readings when they are hot and cold. What is the PSI when the motor is warm? Back me up here Martin ? What color is the gasket?

[@MrGuitarguyadam]

martin, did removing the baffle in the valve over effect the pvc? if so, good or bad?

[@joebidden4914]

I would like to know this too if removing the baffle allowed caused any difficulties of had any negative effects like more oil in the intake?

[@joebidden4914]

I would like to know this too if removing the baffle allowed caused any difficulties of had any negative effects like more oil in the intake?

[@martinbuilt]

+MrGuitarguyadam I can of wonder if I needed to do that. I think you would if you have the older aluminum valve cover. I believe the steel cover gives a little more clearance that the aluminum.

[@joebidden4914]

awesome thank you

[@MyLonewolf25]

My question is if they're all in line why aren't they all on a single shaft?

[@mrantihippie]

More metal. More complicated.

[@landoflakes92]

Because its an overhead valve engine, not an overhead cam engine.

[@JohnSmith-mg5ve]

since they are right there why didn't you replace the pushrods?

[@martinbuilt]

+John Smith Maybe I should have. The original ones looked real good.

[@FPSNovaS]

Will those rockers work with my 4.2

[@kseel6453]

Apparently they do make them for 1983-1986 Jeep CJ 258 engines. Not sure if earlier CJ's valve covers are not tall enough for this application as there is no reason stated why they are not recommended for earlier Jeeps.

[@0GSkywa1ker]

what kind of socket were you using. not size or anything just in general, i like how it can move up and down for better angles.

[@martinbuilt]

+0GSkywa1ker I believe you are referring to the 3/8 drive ratchet wrench with the flex head. This wrench is a Craftsman brand. It is one of my favorites. Also works great as a breaker bar because it has a longer handle.

[@SuperDagod1]

Why does your air intake go across your engine and into the vehicle?

[@martinbuilt]

That's my cold air intake. I have a video on it. The filter sits inside of the cowl.

[@martinbuilt]

Don't recall the ratio. But I would see if the part number of a factory rocker for the 4 and 6 cylinder are the same. If so I don't see why they wouldn't fit.

[@martinbuilt]

the air filter is inside the cowl.

[@HDnUmBeR2]

Mine burns oil like a savage now the baffle is cut out. Ot sure what to do now

[@martinbuilt]

remove the vent hose from the throttle body and place a small breather filter on the end of the hose and mount it higher than the valve cover and install a plug on the TB.

[@johnathonrambo]

Might throw in a new pcv valve might help with oil loss

[@jesusmanueldominguezt.3284]

Could you tell me what is the piece number?

[@martinbuilt]

Jesús Manuel Dominguez T. it's in the description

[@AlloyDiesel]

does this reduce the rocker noise? I would like my engine to have less clickitclac.

[@martinbuilt]

I can't say that it would make it quieter. Are you sure its not the lifters that are making all the noise.

[@AlloyDiesel]

thanks for the helpful information. The noise is most likely lifters, but it's not unusual, most 4.0 I have heard have it. I am just being picky. My 4.0 would have a very sweet/smooth sound if not for the loud lifter tap common to all these engines.

[@billyfregiajr1961]

How much for those

[@martinbuilt]

Harland Sharp (S40196) 1.6:1 Ratio Rocker Arm Pedestal Mount for 4.0L Jeep amzn.to/2CzZK44

[@waynesanders1406]

You didn't leave it open to check for valve lash? You just torque'em and they're good? I just reinstalled rocker arm assemblies and they all loosened up and came apart. I have a lifter that came apart as a result.

[@martinbuilt]

hydraulic lifters are self adjusting, no need to adjust them. Torque to 19 ft.lbs. and your done.

[@waynesanders1406]

I have a Golen stroker that I'm in the middle of rebuilding and the rods are very tight with the feet of the rockers sitting a quarter of an inch off of their pedestals. I can tell by the feel I'll hit 19ft lbs before they land, and I just had to pull the head and lifters because the rockers were loose after running for 30 minutes, and a lifter flung apart (looks like the loose action caused the rod to knock the retaining clip outboard)

[@martinbuilt]

Wayne Sanders You must have some really strong valve springs. I would recommend do one cylinder at a time bring to top dead center then torque that set of rockers down

[@hachi-rokuperformancegroup3987]

Wayne Sanders never checked lash on a 4.0 never a problem. As he said they self adjust

[@majhmr6257]

Like all your videos, this is very informative and well made. I have an almost stock '00 XJ I6 4.0L. I did install a slightly larger TB. I'm looking to increase power. Is installing these Roller Rockers a good next step or is it further down the list of items you would replace or modify before doing this?

[@martinbuilt]

+MAJ HMR I would do a true cold air intake (CAI). Don't use a K&N air filter, those are dirt suckers. Hi flow cat and a free flow cat back exhaust. It would be a waist of money to do these rockers at your point of the build.

[@majhmr6257]

I'm in the process of using your video on CAI. I'm not a K&N fan. I'm looking into the exhaust system. If you have recommendations there, I'd appreciate it.

[@davidjessee7701]

Great video..ashame you have to cover up those beautiful rockers with a valve cover.. should at least powder coat the cover some bitchin color..lol

[@citydemo5701]

they should have kept them stainless. I don't see the point in coloring them if its not a visible component beside giving you a uneasy feeling when you throw the cover back over them.

[@AudioFreqx]

@@citydemo5701 Anodizing hardens them.

[@Kim_Alexander]

what diffrent does this upgrade makes?

[@martinbuilt]

It places less stress on the valve guides that way there's less wear on them. Higher RPM potential. And I would imagine you gain just a few horsepower. I've been running them for years now with absolutely no issues.

[@randomcitizen2384]

Those are expen$ive! I could understand using them on a new stroker build, but could not justify the cost to put them on my nearly 200k mile engine just to save on some rattle.

[@martinbuilt]

There was a video done where it was proven that these these roller rockers will give you 8 to 13 horsepower, so for $400 or whatever they're going for now, I think it Is justified. Besides, you know what Jeep stands for. Justify Every Expensive Purchase 😁

[@ddesilva61]

Did you really notice any performance gains...?

[@martinbuilt]

nothing that I could feel. With these rockers you'll have less valve guide wear.